Double Ring Sperm Stopper is made of stainless steel. It has a smooth shaft and two steel rings for intense stimulation and pleasure. We recommend a good quality lubricant is used for easy insertion. To be used by an experienced person. The length from the stopper is 3.14 in. - Rounded tip for easy insertion - Through hole - No porous - Urinating and ejaculating with ease - Available in Blister package for better protection Dimensions: 3.9 x .39 in.